Improving core strength is a fundamental element to improving your swim time in a triathlon. A strong core keeps your body long, narrow and streamlined, ready to knife through the water. A conditioned core is also crucial to optimizing energy when rolling your body from side to side, as opposed to staying flat on the surface.
Check out this video to give you some ideas on how improving your core will increase swimming efficiency. I am working on my core very consistently right now and finding fun new ways to do it almost every day. Message me or give me a call for a great core strength session!